ES347976A1 - Fuel assembly for nuclear reactors - Google Patents

Fuel assembly for nuclear reactors

Info

Publication number
ES347976A1
ES347976A1 ES347976A ES347976A ES347976A1 ES 347976 A1 ES347976 A1 ES 347976A1 ES 347976 A ES347976 A ES 347976A ES 347976 A ES347976 A ES 347976A ES 347976 A1 ES347976 A1 ES 347976A1
Authority
ES
Spain
Prior art keywords
bundle
pins
section
fuel
portions
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
ES347976A
Other languages
Spanish (es)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of ES347976A1 publication Critical patent/ES347976A1/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
    • G21C3/30—Assemblies of a number of fuel elements in the form of a rigid unit
    • G21C3/32—Bundles of parallel pin-, rod-, or tube-shaped fuel elements
    • G21C3/326—Bundles of parallel pin-, rod-, or tube-shaped fuel elements comprising fuel elements of different composition; comprising, in addition to the fuel elements, other pin-, rod-, or tube-shaped elements, e.g. control rods, grid support rods, fertile rods, poison rods or dummy rods
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
    • G21C3/30—Assemblies of a number of fuel elements in the form of a rigid unit
    • G21C3/32—Bundles of parallel pin-, rod-, or tube-shaped fuel elements
    • G21C3/3213—Means for the storage or removal of fission gases
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
    • G21C3/30—Assemblies of a number of fuel elements in the form of a rigid unit
    • G21C3/32—Bundles of parallel pin-, rod-, or tube-shaped fuel elements
    • G21C3/322—Means to influence the coolant flow through or around the bundles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Structure Of Emergency Protection For Nuclear Reactors (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

A nuclear fuel assembly comprises, within a coolant circulation duct, a bundle of fuel pins each comprising a can of which one portion is loaded with fissile material and another portion constitutes an expansion chamber, those portions of the cans loaded with fissile material being at the same level within the duct, and the fuel pins being arranged in two sections in which the expansion chambers are disposed at different levels in the duct. The assembly for use in a fast reactor, shown in Figs. 1 and 2, comprises a central bundle of pins loaded with fissile material disposed within a duct 16 of hexagonal cross-section between a top bundle 12 and a bottom bundle 14 of pins loaded with fertile material. The fuel and the expansion chamber portions of the pins of the central bundle are separated by racks 42 in the pin cladding. A first section 10a of the central bundle occupies the centre of the bundle and has a cross-sectional area corresponding to that of a central passageway left free by the top and bottom bundles 12, 14. This section is composed of pins whose expansion chambers are located above the fuel portions. In order to permit of free expansion, the pins of the section 10a are simply guided by the pins of the second section 10b and by the pins of the top bundle 12, being suspended from a lifting head 22 at their upper ends whilst their lower ends are left free. The second section 10b is made up of the remainder of the pins of the central bundle and the expansion chambers of this section are placed beneath the fuel portions. These pins are suspended from a grid 32 and guided at their lower ends by a grid 36. The coolant is admitted in the direction of the arrows f through an inlet 20 in a bottom end-fitting 18 and the greater part passes upwardly along an axial portion delimited by the pins of the bottom bundle 14 and the expansion chambers of the bundle section 10b, thus by-passing the bottom bundle and the expansion chambers from which only a relatively small amount of heat is released. The flow is then distributed between the necked portions of the section 10b and cools in a uniform manner the fuel portions of both sections 10a, 10b. At the level of the grid 32, the greater part of the flow escapes laterally into the top bundle 12 which, by reason of the larger diameter of the top bundle pins, affords a lower pressure drop coefficient than the section 10a of the central bundle.
ES347976A 1966-12-05 1967-12-05 Fuel assembly for nuclear reactors Expired ES347976A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR86220A FR1519594A (en) 1966-12-05 1966-12-05 Fuel assembly for nuclear reactor

Publications (1)

Publication Number Publication Date
ES347976A1 true ES347976A1 (en) 1969-06-01

Family

ID=8621999

Family Applications (1)

Application Number Title Priority Date Filing Date
ES347976A Expired ES347976A1 (en) 1966-12-05 1967-12-05 Fuel assembly for nuclear reactors

Country Status (9)

Country Link
US (1) US3573169A (en)
BE (1) BE706867A (en)
CH (1) CH483082A (en)
ES (1) ES347976A1 (en)
FR (1) FR1519594A (en)
GB (1) GB1139968A (en)
LU (1) LU54958A1 (en)
NL (1) NL6716305A (en)
SE (1) SE326781B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE755542A (en) * 1969-09-17 1971-02-01 Commissariat Energie Atomique FUEL NEEDLE HITCHING DEVICE
DE2249049C2 (en) * 1972-10-06 1984-04-19 Interatom Internationale Atomreaktorbau Gmbh, 5060 Bergisch Gladbach Reactor core for fast liquid metal-cooled power reactors
FR2513797A1 (en) * 1981-09-30 1983-04-01 Commissariat Energie Atomique HIGHER NEUTRON PROTECTION DEVICE FOR NUCLEAR REACTOR ASSEMBLY
US4462958A (en) * 1982-04-30 1984-07-31 The United States Of America As Represented By The United States Department Of Energy LMFBR fuel assembly design for HCDA fuel dispersal
DE3875542T2 (en) * 1987-07-22 1993-03-18 British Nuclear Fuels Plc CORE REACTOR GAP ZONE SUB UNIT.
GB2221079A (en) * 1988-07-19 1990-01-24 Atomic Energy Authority Uk A method and apparatus for inhibiting thermal cycling

Also Published As

Publication number Publication date
BE706867A (en) 1968-04-01
FR1519594A (en) 1968-04-05
GB1139968A (en) 1969-01-15
NL6716305A (en) 1968-06-06
LU54958A1 (en) 1968-02-16
CH483082A (en) 1969-12-15
US3573169A (en) 1971-03-30
DE1589664A1 (en) 1970-09-17
DE1589664B2 (en) 1972-12-21
SE326781B (en) 1970-08-03

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